Forwarded MX record gets denied?

i have an account on the server that has its MX record forwarded to an external IP address where they run their own mail server. The client recieves email fine from all sources except for any account on that machine. This is a problem because all of our support emails are hosted on that machine, and we cannot send/recieve support issue emails. any idea what could be causing this?

i had an error in my named.conf. i fixed that and tried again and now the error i get back is...

all relevant MX records point to non-existent hosts:
it appears that the DNS operator for this domain has installed an invalid MX record with an IP address instead of a domain name on the right hand side

...this is true, the MX record for domain.com is an IP number. The machine is a w2k server running exchange. it doesn't have a domain assigned to it so i put the IP address in. Does that machine need a domain?

jdavis@sarasotabayclub.net
all relevant MX records point to non-existent hosts:
it appears that the DNS operator for this domain has installed an invalid MX record with an IP address instead of a domain name on the right hand side.

Did you find a fix for this. That the sarasotabyclub.net domain name is hosted by another host and they may have it setup on an IP address instead of a domain. But that's bogus isn't it? It should work either way.

Please let me know...

Thanks in advance!

UPDATE.... I did find a fix for this. I added the following line to my /etc/exim.conf file toward the top and it works now:

An MX record must must MUST point to a hostname.... always. And that hostname has to be resolving to the nameserver in question where the MX is configured, or the MX will be meaningless and mail will go to a black hole with numerous evil rejection messages.

If you point an MX to &amp;mail.domain.com&amp;
( IN MX 10 mail.domain.com. )

Then make sure that later in the zone you specify where &amp;mail.domain.com&amp; goes, with an A or CNAME record....